Internal-combustion engine, which may be directly reversed



H. H. BLACHE.

INTERNAL COMBUSTION ENGINE, WHICH MAY BE DIRECTLY REVERSED.

APPLICATION FILED SEPT, 10, 1920.

1 99,723. Patented Dec. 6, 1921.

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tJNl'i'ilD STATES HANS HENRIK BLAGHE, 0F HELLEBJU P,

NEAR COIPENI-IAGEN, DENMARK.

weaves.

Specification of Letters Patent.

Patented Dec, 6, 119231.

Application filed September 10, 1920. Serial No. 409,470.

To aZZ whom it may concern:

Be it known that I, Hans HENRIK BLACHE, residing at No. 32 Sofievej, l-lellerup, near Copenhagen, Denmark, have invented certain new and useful Improvements (for which I have filed application in Denmark on April 12, 1918) in Internal-Combustion Engines, Which may be Directly Reversed, of which the following is a specification.

in internal. combustion engines, which may be directly reversed and whichare controlled by valves, provision should be made for the opening of a valve or the like during the reversal in order to blow out the pres sure within the cylinder so that after the reversal the engine may be started exactly similarly to the startingirom rest-position.

The present invention has for its object the provision of means by which the blow-oil valves are automatically opened during the reversing operation so that the pressure is equalized by said valves. F or that purpose one part which i shifted during the reversing operation isconnected with a pawl-arm or the like, which during said operation acts on a roller on the lever controlling the blowof]? valve, so that said valve is automatically opened during the reversing operation. Said pawl-arm or the like is arranged in such a manner that it acts only on the blow-oil valve during the reversing operation. When said operation is completed the pawl-arm is at once released from the roller of the valve controlling. lever,

A constructional term of the invention is illustrated in the accompanying drawing in which:

Figure 1 show parts of an internal combustion engine provided with the improved means and Fig. 2 shows a detailthereof.

/Vhen the engine is running the different valves are operated. by horizontal levers which are connected to vertical rods, the lower end of each rod being provided with a roller co-acting with a cam on a rotary cam shaft.

When the engine is to be reversed, said vertical rods are moved out of engagement with the cam-shaft which then is adjusted to bring into position the cams correspond ing to the reverse running oi the engine, whereupon the rollers of the vertical rods are brought in engagement with said cams.

a; 1) is the blow-oil valve which is moved in the known manner from the horizontal lever b pivotally mounted on the pivot c and pivotally connected to the vertical rod cZ provided with a roller e, which e11- gages the periphery ofthe cam 9, so that the rod cl is raised and lowered during the rotation of the cam shaft 7. During the reversing operation the rods (Z are moved out of engagement with the cams g by links It connected to arms 2' on the reversing shaft 7c by the rocking of which the rollers e are brought into or out of engagement with the cams 9.

According to the invention a pawl-arm Z is arranged below the lever Z), having its fixed pivot m in a mounting on the cylinder cover. The upper end of the pawl-arm is inclined and the lever 72 is provided with a roller 42 on which the pawl-arm acts when moved with the vertical rod 0?; The pawlarm Z is connected to the rod (Z by a link 0 pivotally connected to said rod 0! by a pin p. In the form illustrated the pawl-arm is provided with a cylindrical part (see Fig. 2) inclosing a cylinder 1" connected with the pawl-arm by two pivots s. Withinthe cylinder r a coiled spring 9 is mounted, which spring is compressed when i the link 0 is moved outward with the vertical rod cZ. During the outward movement the pressure of the spring 9 on the closed end of the cylin der T will move the pawl-arm Z outward, so that the inclined upper end of said pawlarm acts on the roller n thereby rocking the lever b to open the blow-oil valve a. When the reversing operation is completed the rod (Z is moved inward. By this movement the pawl-arm Z is moved back to release the roller n so that the lever Z) again can operate the valve normally. 1f the lever b, when the reversing operation is commenced, is in such a position that the pawl-arm can not pass under the roller 72 when the vertical rod (Z is moved outward, the spring 9 will be compressed and remains compressed until the roller a during the running of the engine again comes in a position, which permits engagement, whereupon the spring q at once draws the pawl-arm Z under the roller, thereby causing the opening of the blow-oft valve.

I claim:

1. In combination, an engine cylinder having a blow-oil valve; a reversing mechanism; a lever connected to control said valve; a roller on said lever; and a movable device connected to be shifted automatically by said mechanism during the reversing operation and itself engageable with said roller at such time to rock said lever and thereby open the valve.

2. In combination, an engine cylinder having a blow-off valve; a reversing mechanism; a lever connected to control said valve; a roller on said lever; and a pivotally mounted pawl-arm connected to be shifted automatically by said mechanism during the reversing operation and itself engageable with said roller at such time to rocksaid lever and thereby open the valve.

3. In combination, an engine cylinder having a blow-off valve; an operating lever therefor; a rod for operating said lever; a cam shaft for operating said rod; a reversing mechanism connected to shift said rod during the reversing operation; and a device pivotally connected to the cylinder and adapted tobe automatically shifted by said rod when the latter is shifted, said device operating said lever during its shifting movement to open said valve.

4. In combination, an engine cylinder having a blow-off valve; an operating lever therefor; a rod for operating said lever; a cam shaft for operating said rod; a reversing mechanism connected to shift said rod during the reversing operation; a pawl-arm pivotally connected to the cylinder and engageable With said lever to rock the same and thereby open the valve; and a -connect ding link between said rod and pawl-arm for operating the latter when the former is shifted by the reversing mechanism, said link being pivotally'connected to said rod and pivotally and yieldingly connected to said pawl-arm.

5. In combination, an engine cylinder having a blow-off valve; a controlling lever therefor; a movable device engageable with said lever to rock the saine'and thereby open the valve; a reversing mechanism; and con nections between said device and said mechanism for automatically operating the former during the reversing operation, said connections comprising a link which is pivotally and yieldingly connected to said device.

6. In combination, an engine cylinder having a blow-off valve; a controlling lever therefor; a pawl arm pivotally mounted on said cylinder and engageable with said lever to rock the same and thereby open said valve; a reversing mechanism; and connections between said pawl-arm and said mechanism for automatically operating the former during the reversing operation, said connections comprising a spring-pressed link pivotally connected to said pawl-arm.

7. In combination, an engine cylinder having a blow-off valve; a controlling lever therefor; a pawl-arm pivotally mounted on said cylinder and engageable with said lever to rock the same and thereby, open said valve; a reversing mechanism; and connections between said pawl-arm and said mech anism for automatically operating the former during the reversing operation, said connections comprising a cylinder pivotally connected to the pawl-arm, a. link extending therethrough, and a spring within the cylinder to act on said link.

In testimony whereof I afiix my signature.

HANS HENRIK BLACI'IE. 

